Title: La faja metalogenética de San Luis, Sierras Pampeanas: mineralizacióny geocronología en el contexto metalogenético regional
Abstract: The San Luis Metallogenic Belt (SLMB), Sierras Pampeanas: mineralization and geochronology in a regional metallogenic framework. The San Luis Tertiary Metallogenic Belt located in the Sierras Pampeanas of San Luis is related with the subduction zone sha- llowing between 27o and 33o S. Several mineralizations of epithermal and porphyry types are located along an 80 km WNW- trending belt. They are closely related to the normal to high-K calc-alkaline and shoshonitic volcanism, which began at ~ 12- 13 Ma in the west and ended at 1.9 Ma in the east indicating a swift eastward shift of the volcanic front. La Carolina and Canada Honda are the most important metallogenic districts, including epithermal and porphyry deposits. The San Luis Metallogenic Belt reflects the extraordinary broadening of the magmatic arc at 33o S and resembles the situa- tion of the Farallon Negro district at 27o S. Both have similar geochemical signatures and were emplaced in the south and north transitions zones of the flat-slab segment where the subduction angle changes. The transversal attitude with regard to the Andean magmatic arc could be taken as strong evidence to suggest structural weakness zones along 27o and 33o S that led to the magma ascent and controlled the formation of hydrothermal mineralization.
Publication Year: 2009
Publication Date: 2009-06-01
Language: en
Type: article
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Cited By Count: 9
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